Apple Hearing Study
Public ClinicalTrials.gov record NCT04172766. Field values are reproduced from the official study page; the official ClinicalTrials.gov record remains the source of truth for eligibility, enrollment, and contact information.
Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.
Official title
Apple Hearing Study: Characterization of Headphone Audio Levels, and Optional Wristwatch-Based Environmental Sound Levels, With Variable User Interface
Study identification
- NCT ID
- NCT04172766
- Recruitment status
- Active, not recruiting
- Study type
- Observational
- Phase
- Not listed
- Lead sponsor
- Apple Inc.
- Industry
- Enrollment
- 300,000 participants
Conditions and interventions
Conditions
Interventions
Not listed
Eligibility (public fields only)
- Age range
- 18 Years and older
- Sex
- All
- Healthy volunteers
- Accepts healthy volunteers
This page does not interpret eligibility. Detailed inclusion and exclusion criteria are on the official ClinicalTrials.gov record.
Study timeline
- Start date
- Nov 13, 2019
- Primary completion
- Aug 30, 2029
- Completion
- Nov 30, 2029
- Last update posted
- Mar 18, 2026
2019 – 2029
United States locations
- U.S. sites
- 1
- U.S. states
- 1
- U.S. cities
- 1
| Facility | City | State | ZIP | Site status |
|---|---|---|---|---|
| University of Michigan School of Public Health | Ann Arbor | Michigan | 48109 | — |
Site contact phone numbers, emails, and investigator names are intentionally not displayed here. Open the official ClinicalTrials.gov record for site contact information.
About this trial record page
- What this page shows
- Public field values for ClinicalTrials.gov record NCT04172766, including study identification, conditions, interventions, eligibility (age, sex, healthy volunteer), timeline, and U.S. site list.
- What this page does not do
- No medical advice, eligibility judgments, treatment recommendations, study quality scoring, or AI-generated medical summaries. No site contact phone numbers, emails, or investigator names.
- Where the data comes from
- Sourced from the official ClinicalTrials.gov public API. The official record is the source of truth.
- Last refresh
- Last update posted Mar 18, 2026 · Synced May 8, 2026
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Open the official record
The complete protocol, eligibility criteria, and contact information for NCT04172766 live on ClinicalTrials.gov.